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Motorcycle-Rider Servomechanism Steering Theory
Technical Paper
2000-01-3565
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The known “countersteering” theory on how a motorcycle (or bicycle) is steered, fails to explain the sudden steering precision and smoothness gained as soon as the hands are put on the handlebar. We have derived an enhancement to this known countersteering theory that includes servomechanism concepts. The new servomechanism steering theory gives calculated stable speeds that correlate with testing. It explains the steering difference observed with and without hands on the handlebar. It predicts leaning angles in steady state curves that also correlate with testing. It explains how a single track test vehicle can be stable and can be steered with hands on the handlebar, even though it has zero fork angle, zero front trail and skates instead of wheels to have zero gyroscopic forces and zero power. Based on this servomechanism theory, a technique is suggested to develop enhanced motorcycle riding skills. Finally, this servomechanism theory is used to explain how added driving mechanisms can be developed to enhance stability and steering of a motorcycle equipped with roll cage, back rest and seat belts.
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Authors
Citation
Ethier, P., "Motorcycle-Rider Servomechanism Steering Theory," SAE Technical Paper 2000-01-3565, 2000, https://doi.org/10.4271/2000-01-3565.Also In
References
- Ethier Pierre M. “Dynamique des Vehicules à Deux Roues et Modifications les Rendant Plus Securitaires” Master thesis in Mechanical Engineering Universite Laval Quebec, Canada 1974 109
- Motorcycle Safety Foundation February 2000
- Motorcycle Safety Foundation “The Motorcycle Safety Foundation's guide to Motorcycle Excellence” Whitehorse Press 1995 1-884313-01-9 123 125
- Code Keith “A Twist of the Wrist Volume II” Glendale, CA 1993 0-9650450-2-1 34 38 53
- Ethier Pierre M. “GUIDON SPECIAL DE VEHICULE A DEUX ROUES” 1976
- Turbopress Inc. Motojournal August 1999 23
- Turbopress Inc. Motojournal June 1998 17